STANDARDOWY BLOK Z GĄBKI Z ŻÓŁTEJ PIANKI ROCKWOOL Z WĘNY KAMIENNEJ NACZYŃ STARTOWY Model 3D

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Included File Formats
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• - Rhino (.3dm) – Provided for Rhino users

Model Info
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• - Geometry uses real-world scale; model resolution varies depending on the product (high or low poly)
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• - Rendered using Luxion KeyShot
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More Information About 3D Model :
The "Standard Yellow Foam Sponge Block Rockwool Stonewool Starter Pot" refers generically to a class of synthetic, inert propagation substrates used extensively in Controlled Environment Agriculture (CEA), particularly within hydroponic and aeroponic systems. While the descriptive title is highly compound and technically conflates fundamentally different materials (polymeric foam versus mineral wool), the primary product described is a standardized, low-density, open-cell foam block, typically colored yellow, designed specifically for the germination of seeds or the rooting of vegetative cuttings.

### 1. Definition and Nomenclature

This substrate functions as a starter plug or cube, providing a sterile, moist, and physically supportive matrix for early-stage plant development before transplantation. The term "sponge block" distinguishes it structurally from traditional substrates like compressed peat pellets or fibrous mineral wool (rockwool/stonewool). The standardized yellow coloration is often achieved through non-phytotoxic pigmentation and is common among foam products derived from materials such as phenolic resins or specialized, hydrophilic polyurethane (PU) foams. These foam blocks are engineered to mimic the structure and functionality of highly porous media, optimizing the delicate balance between oxygen availability and moisture retention necessary for robust root development.

### 2. Material Composition and Manufacture

The blocks are constructed from synthetic polymers processed into an open-cell structure. The resulting matrix exhibits a high degree of porosity, typically achieving a total air-filled porosity (AFP) ranging from 15% to 30% when saturated, ensuring sufficient gaseous exchange to prevent hypoxia.

* **Phenolic Foam:** A common material choice due to its inherent sterility and structural integrity. Blocks derived from phenolic foam typically exhibit a neutral or slightly acidic pH (near 6.0–6.5), requiring minimal conditioning compared to certain rockwool types which may possess higher initial alkalinity.
* **Polyurethane (PU) Foam:** Specialized horticultural-grade PU foams are also utilized. These are designed to be stable, chemically inert, and highly absorbent without degrading or releasing harmful volatile organic compounds (VOCs) into the nutrient solution.

Manufacturing involves forming the foam into large sheets, followed by precision cutting into standardized cubic or cylindrical modules. These blocks often feature pre-drilled holes or indentations to facilitate easy placement of seeds or cuttings, thus simplifying mass propagation protocols.

### 3. Functional Characteristics and Application

The primary function of the foam starter pot is to isolate and support the developing root system while maintaining optimal hydric and atmospheric conditions.

| Characteristic | Description | Advantage in Propagation |
| :--- | :--- | :--- |
| **Water Holding Capacity (WHC)** | High WHC, often exceeding 80% by volume. | Reduces frequency of initial watering; maintains localized moisture gradient. |
| **Inertness** | Chemically stable; does not interact negatively with nutrient solutions. | Provides a sterile environment, mitigating risks of soil-borne pathogens and nutrient binding. |
| **Drainage** | Excellent drainage rate due to large, interconnected pores. | Prevents waterlogging (anoxia) immediately following irrigation cycles. |
| **Structural Integrity** | Rigid enough to support the seedling but soft enough to allow root ***********. | Facilitates easy transplanting without disturbing the fragile primary roots. |
| **pH Stability** | Generally pH neutral or mildly acidic. | Less requirement for pH buffering or flushing prior to use compared to traditional rockwool. |

Foam starter blocks are compatible with virtually all non-soil cultivation methodologies, including Nutrient Film Technique (NFT), Deep Water Culture (DWC), and ebb-and-flow (flood and drain) systems. They are particularly favored for large-scale operations requiring uniformity and easy handling during transplanting into larger media like coco coir, expanded clay pebbles (hydroton), or permanent rockwool slabs.

### 4. Comparison to Rockwool/Stonewool

The inclusion of "Rockwool Stonewool" in the product title reflects the primary alternative product class. While both materials serve the same functional purpose (seed/cutting initiation), they differ fundamentally in composition:

1. **Material:** Foam blocks are petrochemical derivatives (synthetic polymers). Rockwool is a mineral fiber product created by spinning molten basalt or other stone/slag materials.
2. **Fiber vs. Cell Structure:** Foam possesses a closed, sponge-like cell structure (though open-pored). Rockwool is composed of interwoven, non-aligned fibers.
3. **Initial pH:** Rockwool typically has a high initial pH (above 7.5), necessitating pre-conditioning with acidic water. Horticultural foam is generally closer to neutral.
4. **Handling:** Foam blocks are often less irritating to handle than mineral wool fibers.

The "Standard Yellow Foam Sponge Block" offers a reliable, standardized, and reusable option in modern horticultural science, balancing effective moisture retention with superior aeration characteristics for initial propagation stages.

KEYWORDS: Hydroponics, Propagation Substrate, Seed Starting, Cloning, Rockwool Alternative, Phenolic Foam, Polyurethane Foam, CEA, Growing Media, Soilless Culture, Germination, Starter Plug, Sponge Block, Hydrophilic Polymer, Rooting Medium, Vegetative Propagation, Mineral Wool, Starter Pot, Aeration, Water Holding Capacity, Transplanting, Inert Matrix, pH Neutral, Horticultural Foam, Controlled Environment Agriculture, DWC, NFT, Synthetic Substrate, Open-cell Foam, Stone Wool.